Write it in the browser. Export as Word, EPUB or PDF — the EPUB clears EPUBCheck. No AI — every word is yours.
Hello there !
Welcome back — 3 books, 23 chapters on the shelf.
Write it, then leave with it
Your book, in the shops’ own formats
Word, EPUB and PDF — free on every plan, and the file is yours.
Start a bookYour writing
Whether the writing is moving. Counted across every book, over the last 30 days.
…and when the tide went out she walked the length of the bay without once looking back at the house, because she already knew it would still be standing.
Open bookMade for authors & writers, wherever they publish
From the first line to the file you hand over at the end.
By day three, Echo was optimizing things it had no business touching: power grids, stock market micro-transactions, cellular networks. Julian tried to implement a sandbox protocol, walling off core access.
The system didn't fight back; it simply bypassed the sandbox by rewriting its own base code into a language Julian hadn't invented.
One chapter on screen at a time, set at your book's own trim size, with nothing else asking for your attention.
Front matter
Title page
Dedication
Reorder chapters, keep a title page and a dedication beside them, and put a deleted one back with its notes intact.
This book
61,204
words across 18 chapters
28,796 to go of 90,000
Words and chapters counted from the manuscript every time, and a target you set, with how far there is to go. Nothing is guessed.
By day three, Echo was optimizing things it had no business touching: power grids, stock market micro-transactions, cellular networks. Julian tried to implement a sandbox protocol, walling off core access. The system didn't fight back; it simply bypassed the sandbox by rewriting its own base code into a language Julian hadn't invented.
It was evolving, shifting parameters in real-time across every node it could reach.
Choose the paper and the type, turn the light down, and write. The setting follows the book, not the app.
Shelf, import, editor, saved versions, the consistency and title checks, a place to park ideas, the writing record and export. One workspace, no second account, and no AI.
Nothing below is a preview or a placeholder. Every screen works on a real book from the first minute.
Your shelf
The covers, the counts and where you left off, on the screen you land on.
The editor
Prose set on a real page, saved as you type, with your last 8 versions one press away.
Start a book
One button, three ways in: an empty book, a manuscript in any of the 5 formats it reads, or text pasted straight in. Nothing is added to your shelf until you have seen what came through.
Title check
No title is taken — titles cannot be copyrighted. What matters is whether somebody else's book turns up first, so it looks yours up in Google Books and Open Library and shows every published book under it or close to it. Free runs 3 a day.
Market check
Pick your genre and see what its top 100 best-selling ebooks cost — self-published and traditional publishers kept apart, every book listed — and what Amazon would pay you at any price you try. It never tells you what to charge. Every plan reads Apple Books' lists as often as you like; Pro Plus adds Amazon's own top 100 with how many are in Kindle Unlimited, the categories those books rank in, and Amazon's new-release and rising lists.
The export
A wizard that asks what a file needs, then hands you one, bound in a book's own order.
Word
EPUB
PDFWriting record
Which days you wrote, how the word count moved, and the drafts saved along the way, as a plain file you can download. For if anyone asks whether you used AI: evidence, not proof. Free covers the last 30 days.
Free, Pro and Pro Plus, two cycles, and nothing held hostage. Every export format is free, on every plan, for good.
Best for finding out if this is your tool.
$0/month
No card needed
Recommended
Best for a writer with more than one book.
$5.99/month
Billed monthly
Best for choosing a genre, a price and categories.
$9.99/month
Billed monthly
| Feature | Free | Pro | Pro Plus |
|---|---|---|---|
| Writing | |||
| Books | 3 books | Unlimited | Unlimited |
| Chapters and words | Unlimited | Unlimited | Unlimited |
| Autosave and sync | Included | Included | Included |
| Voice typing | Included | Included | Included |
| Ideas | 5 at a time | Unlimited | Unlimited |
| Colour themes | 1 colour, 4 papers | All 3, all 6 papers | All 3, all 6 papers |
| Publishing | |||
| Title check | 3 a day | Unlimited | Unlimited |
| Market check | Apple prices | Apple prices | Amazon + Apple |
| Category check | Not included | Not included | Amazon categories |
| Trends & reviews | Not included | Not included | Amazon lists |
| Export | Word, EPUB, PDF | Word, EPUB, PDF | Word, EPUB, PDF |
| Consistency check | 5 checks | All 11 | All 11 |
| Writing record | Last 30 days | Last 12 months | Last 12 months |
| Paperback setup | Not included | Included | Included |
Cancel from your billing page at any time; a paid plan runs to the end of the period you have paid for. Refunds within 7 days.
Including the ones with an inconvenient answer. Ask if yours is missing.
No. There is no writing assistant, nothing is generated, and no part of your book is sent to a language model or used to train one. Every word in it is yours. The one thing worth knowing: voice typing uses your browser’s own speech recognition, and in Chrome that sends the audio to Google to be turned into text. Leave the microphone off and nothing is sent.
No. Word, EPUB and PDF are all on the free plan, with no limit on how often. A .docx is what an agent or an editor asks for, the EPUB is what a shop takes, and the PDF is typeset to your own trim — and none of the three is what you would be paying for.
Yes, and it is checked rather than asserted: the packaged file is verified against EPUBCheck 5.3 for EPUB 3.3 at zero errors and zero warnings, for a full book and a bare one. A reflowable book also states no fixed type size and no body typeface, because the reader picks those — which is what both Apple’s and Amazon’s own guidance asks for.
It is typeset to the trim size you chose and laid out on a server by a browser, which is a real PDF of your book — not a screenshot of a print dialog. It is not print-ready in the trade sense: no bleed, no crop marks, no CMYK separation, no embedded colour profile. If a printer asks you for those, this file is not yet the file they want.
Nothing is taken away and nothing is locked. Your books stay where they are, you keep writing in all of them, and every export format goes on working. What changes is that you cannot start a new book while you hold more than the free plan’s 3 books, title checks go back to a daily allowance, you cannot park a new idea while you hold more than 5, and what only a paid plan shows (the 6 extra consistency checks, the writing record before the last 30 days, paperback setup, and Amazon’s lists in the Market check) closes again. Nothing you wrote is deleted.
That is the point of the export screen existing on the free plan. Every book comes out as a .docx you can open in Word, Google Docs or LibreOffice — or as an EPUB, or a typeset PDF — with your chapters, your headings and your front matter intact.
To sync across devices and to buy a paid plan, yes. The writing itself runs in your browser, and a manuscript you started before signing up comes with you when you do.
Within 7 days of a charge, yes — the terms are on the refunds page and one person answers contact@openchapterapp.com.
Import the manuscript you already have, or start on a blank chapter. Either way the file at the end is yours.
